<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <button @click="insert">添加</button>
        <ul>
            <li v-for="item in list">{{item}}</li>
        </ul>
    </div>

    <script src="https://unpkg.com/vue@next"></script>
    <script>
        Vue.createApp({
            data(){
                return {
                   list:["香蕉","苹果"]
                }
            },
            methods:{
                insert(){
                    this.list.push("草莓")
                }
            }
        }).mount("#app")
    </script>
</body>
</html>